Multiple telephone-receiver.



W. B. RELTH. MULTIPLE TELEPHONE RECEIVER.

APPLICATION FILED AUG. 14, 1905.

Patented Apr. 11, 1911 na e/75}: Jill/Jam "3, 224% III/l UNITED STATES PATENT curios;

WILLIAM B. RELTH OF CHICAGO, ILLINOIS, ASSIGNOR F NI NE-TENTHS TO HILJSITELY G.

' GUYLE, 015 "WEST UNION, NEBRASKA.

MULTIPLE TELEPHONE-RECEIVER 939,191, Specification of Letters Patent. P t nt d Apr, 11, 1911. Application filed August 14, 1905. Serial No. 274,207.

To all whom it may concern: is provided with two exposed electrical con- Be it known that I, \VIL IAM B. RELTH, tacts, as for instance the binding posts (3, to a Citizen of the United States,.residing at which the loading out wires 7 are connected. Chicago, in the county of Cook and State of Some distance from the receiver and pref- 55 Illinois,have invented a certain new and useerably at their ends the wires 7 are provided ful Multiple telephone-Receiver, of which with means as the spring clipsS for readily the following is a specification. connecting and disconnecting the same to My invention relates to a new article of the exposed electrical contacts, the posts manufacture in the form of a telephone ('1 of another receiver or a telephone instru- 60 .0 receiver with connections, and the objects ment. It will be understood that an ini of my improvements are, first, to produce an definite number of recei vers of this construc- .article whereby a plurality of receivers can tion may be connected together either in be connected to a telephone line and a nunimultiple or in series to a telephone line and her ofpersons can hear the incoming and the messages transmitted over said line can 65 outgoing messages; second, to provide means he heard through each of the receivers. To whereby the several receivers can readily be connect the instrun'ients in series as shown connected or disconnected; third, to make in Fig. l, the spring clips 8 of one-receiver a cheap and durable construction; and other are connected to the posts 6 of another objects to become apparent from the dc receiver. 70

scriptionto follow. Instead of the posts 6 on the receiver 5 lile'retofore when SOS GltLl\.,RBISOlIS d.esircd-l the spring jack or socket 9 having'two conto hear a conversation or i'ness age 'of any tacts insulated from one another may be kind tlTtlIlSllllttBtl -ovei="a telephone line it provided to coopcratejwith a plug 10 havwas accomplished by the aidof a mega- :ing two contacts connected to the ends of 7 phone-or the several persons had to remain the wires 7.

close to the receiver and remain very quiet. 1 2111') aware that telephone receivers have Some of the persons thus listening would been made and used long ago, and that they' ottcngbc uluiblc to hear distinctly and sonie-v have been connected to another instrument times would be unable to understand very by two wires, and do not claim such a dc 8O so important parts of the COIIVQISiLtlOD,3S for vice; but

( XdtllldO when a'business meeting was held \Vhat l do claim as new and desire to between persons in diflierenttmvns or places. secure by Letters .latcnt oi the United By the use of my invention eacl'i'person who States is desires to hear'thc messages transmitted 1. A telephone attzicluncnt comprising over the telephone line is provided with a spring contact devices tor making contact separate receiver and for such purposes my with the terminals oi. the receiver of a teleinvo'ntion is indispensal'ilc. hone set and thereby temporarily securing To describe my invention so that those i said attachmentthereto, said spring contapt versed in the art to which it pertains can devices made integral and so spaced. apart 90 40 h d s 'th' Saving 1 h illustrated that the two separate connections with the it on theaccompanying sheet of drawing 'tcri'ninals of the receiver are made and. in wh.ich:. broken simultaneously and a telephone rcl igurc 1,, is a diagrainn'iatic view showccivcr .i ndu(':ti\-ely connected with said couing several receivers embodying my invcn-' tact devmcs.

lion connemcd in a. series; Fig. 2, an on- 2. A iele ihone attachment comprising larged 'view of my invent-ion, and Fig. 3, spring contact devices for making contact is a sectional view of a modified form of a ,1 with the teri-ninals ot' the receiver of a telecoupling embodied in my invention. phone set and thereby temporarily securing Similar reference characters refer to simisaid attachment thereto, and a telephone '100 lar parts throughout the several views. receiver conduct-ivoly connected with said The receiver 5 is of any construction and contact.devices.

2 .-ese,191

A telephone attachment eem'arising name to this specifieatien in presence of two resilient means for making contact with the subscribing Witnesses this 11th day of terminals of the receiver of a telephone set March, 1905 at Chicago, Illinois. and thereby temporarily securing said at-. WILLIAM B. RELTH.

5 tuehment thereto, and a telephone receiver Witnesses:

eondnctively connected with said. means. JAMES L. L. MOOORMAOK,

In testimony whereof I have signed my R. J. JAOKER. 

